摘要
氮是植物生长发育所需的大量营养元素之一。硝态氮不仅可以被植物直接吸收利用,还可以作为重要的信号分子调控植物对氮素的响应、吸收、代谢相关基因的表达,从而影响植物的生长和发育。豆科植物可以通过与根瘤菌共生互作来获得生长所需的氮,但共生固氮是一个耗费植物能量的过程。当土壤中存在高浓度的氮素时,氮作为信号分子会影响共生固氮基因的功能从而抑制共生固氮过程。目前的研究表明,硝酸盐通过局部和系统的调控方式抑制共生固氮过程;结瘤自主调控(Autoregulation of nodulation,AON)和NLPs(NIN-like proteins)转录因子在硝酸盐抑制豆科植物根瘤形成中有着重要的作用。本文结合最近的研究进展,重点讨论NLPs转录因子和AON途径在硝酸盐抑制共生固氮过程的作用。
Nitrogen is one of major macronutrients to support plants growth and development.Nitrate-nitrogen not only can be directly absorbed and utilized by plants,also affects the development and growth of plants via acting as a molecular signal to regulate the expressions of genes related to nitrogen-responding,absorbing and metabolizing.Legumes plants can obtain the demanded nitrogen for plant growth by establishing a symbiotic interaction with rhizobia;however,nodule formation and nitrogen fixation are energy-consuming processes for plants.When there is high concentration of nitrogen in soil,nitrogen as a signal molecule will affect the function of symbiotic nitrogen fixation gene and thus inhibit the process of symbiotic nitrogen fixation.Current researches reveal that nitrate inhibits symbiotic nitrogen fixation through a local and systemic regulation pathway.Autoregulation of nodulation(AON)and NIN-like proteins(NLPs)play a critical role in symbiotic nitrogen fixation.Combined with the latest researches,this review focuses on discussing the roles of NLPs transcription factors and AON pathways in symbiotic nitrogen fixation.
作者
罗振鹏
谢芳
LUO Zhen-peng;XIE Fang(National Key Laboratory of Plant Molecular Genetics,CAS Center for Excellence in Molecular Plant Sciences,Shanghai Institute of Plant Physiology and Ecology,Chinese Academy of Sciences,Shanghai 200032;University of the Chinese Academy of Sciences,Beijing 100049)
出处
《生物技术通报》
CAS
CSCD
北大核心
2019年第10期34-39,共6页
Biotechnology Bulletin
基金
国家自然科学基金项目(31670242)
关键词
硝酸盐
共生固氮
NLPs转录因子
AON途径
CEP短肽
nitrate
symbiotic nitrogen fixation
NLPs transcription factor
AON pathway
CEP short peptide
